i want asl on deforestation 4 min speach
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Deforestation is decrease of forest cover of an area. World forest cover of 7000 million hectares has been reduced 2400 million hectares in 2000.
It is estimated that about 40% forests have been lost in the tropics compared to 1% loss in temperature regions.
In India, at the beginning of 20th century forest cover was about 30% of the total land. By the end of the century, it shrunk to 19.4%, where as National Forest Policy (1968) of India has recommended 33% forest cover for the plains and 67% for the hills.
Effects of Deforestation:
1. Increase in carbon dioxide concentration in atmosphere.
2. Deforestation results in reduced rainfall, increased draught, hotter summer and colder winter.
3. Soil is exposed to insulation, dries up and gets eroded by wind and water.
4. Timber and fuel wood availability has been drastically reduced. Forest products like resin tannin, gums, latex, lac may not be available.
5. Loss of forest leads to soil erosion and finally desertification occurs which is of no use Moist and fertile land of forests will be converted to deserts due to decrease amount of rainfall and no floods.
6. Deforestation would result in loss of biodiversity and herbalism having devastating effect in ecological balance.
Conservation Strategies:
1. Public awareness:
Public movements like chipko agitation, Tehri Dam development, silent valley movement etc. have created awareness among common man to save forest and save nature.
2. Social forestry:
It is an attempt to increase green coverage through forestry by the people, of the people and for the people. Plantation of trees in schools and colleges through Van Mahotsava, tree plantation in road sides, barren lands, canal sides, public parks and picnic spots etc.
3. Agroforestry:
It is a system of growing plants (forest trees) with agricultural crops.
Agroforestry includes:
(i) Agro-silviculture – tree, crop plants, medicinal herbs, fruit plants are groomed together.
(ii) Agro-silvo-pastoral practice – trees, crops, grasses and sedges are grown together,
(iii) Silvo-pastoral practice – Forest, trees, grasslands are raised together
(iv) Socio-agro-silviculture – coffee, rubber, paper pulp producing trees, crop plants and forest trees are grown together
It is estimated that about 40% forests have been lost in the tropics compared to 1% loss in temperature regions.
In India, at the beginning of 20th century forest cover was about 30% of the total land. By the end of the century, it shrunk to 19.4%, where as National Forest Policy (1968) of India has recommended 33% forest cover for the plains and 67% for the hills.
Effects of Deforestation:
1. Increase in carbon dioxide concentration in atmosphere.
2. Deforestation results in reduced rainfall, increased draught, hotter summer and colder winter.
3. Soil is exposed to insulation, dries up and gets eroded by wind and water.
4. Timber and fuel wood availability has been drastically reduced. Forest products like resin tannin, gums, latex, lac may not be available.
5. Loss of forest leads to soil erosion and finally desertification occurs which is of no use Moist and fertile land of forests will be converted to deserts due to decrease amount of rainfall and no floods.
6. Deforestation would result in loss of biodiversity and herbalism having devastating effect in ecological balance.
Conservation Strategies:
1. Public awareness:
Public movements like chipko agitation, Tehri Dam development, silent valley movement etc. have created awareness among common man to save forest and save nature.
2. Social forestry:
It is an attempt to increase green coverage through forestry by the people, of the people and for the people. Plantation of trees in schools and colleges through Van Mahotsava, tree plantation in road sides, barren lands, canal sides, public parks and picnic spots etc.
3. Agroforestry:
It is a system of growing plants (forest trees) with agricultural crops.
Agroforestry includes:
(i) Agro-silviculture – tree, crop plants, medicinal herbs, fruit plants are groomed together.
(ii) Agro-silvo-pastoral practice – trees, crops, grasses and sedges are grown together,
(iii) Silvo-pastoral practice – Forest, trees, grasslands are raised together
(iv) Socio-agro-silviculture – coffee, rubber, paper pulp producing trees, crop plants and forest trees are grown together
aru21:
thx
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